MDCAT Physics MCQ's Test With Answers

MDCAT Physics MCQ's Test

Sr. # Questions Answers Choice
1 A charge is 90C passes through a wire in 1 hour and 15 minutes. Wat is the current in the wire? 10mA 20mA 15mA 25mA
2 Electric current is defined as: Flow of charges through conductor Rate of flow of charges through conductor Flow of electrons Flow of protons
3 When the length and area of cross-section both are doubled, then its resistance: Will become half Will remain the same Will be doubled Will become four times
4 The rate at which the battery is supplying the electrical energy is the: Power output Electrical power Power input Both A and C
5 A piece of Aluminium (Al) and a piece of Germanium (Ge) are cooled T1 K to T2 K. The resistance of: Each of them increases Each of them decreases Al increases and Ge decreases Al decreases and that of Ge increases
6 The specific resistance of a wire varies with its: Length Cross-section Mass Material
7 The ‘emf ’ is always even when no current is drawn through the battery of the cell: Zero Present Absent Maximum
8 A total charge of 100C flows through 12W bulb in a time of 50 second. Which is the potential difference across the bulb during this time? 0.12V 6.0V 2.0V 24V
9 There are two electric bulbs of 40 W and 100 W. They are first connected in series and then in parallel across a source: 40W bulb will be brighter in series and 100W in parallel 100W bulb will be brighter in series and 40W in parallel 40W bulb will be brighter in both the cares 100W bulb will be brighter in both the cares
10 An electric room radiator, which operates at 50V has resistance of 50 Ω. Power of the radiator is approximately: 100W 50W 450W 1000W
11 The product of resistance and conductance of a resistors is equal to: 1 Conductivity Resistivity Zero
12 Two wires of same material have lengths L and 2L and cross-sectional area 4A and A respectively. the ratio of their specific resistance would be: 1: 1 1: 8 8: 1 1: 2
13 A charge of 2C experiences a force 2000N in a uniform electric field. In this fieldthe potential difference between two points separated by a distance 1cm is 2V 10V 5V 20V
14 Capacitance of a capacitor does not depend upon Separation between plates Thickness of the plates Area of the plates Medium between the plates
15 Two point charges repel each other with a force of 4× 𝟏𝟎−𝟓 newton at a distanceof meter. Two charges are Both positive Alike Both Negative Unlike
16 The potential difference between head and tail of an "electric eel" can be upto. 6V 60V 6000V 600V
17 The relative permittivity of air is 1 3.7 7.8 1.0006
18 The relative permittivity of air is 1 3.7 7.8 1.0006
19 Area under Q-V graph for a capacitor represents Charged stored Energy stored Electric field strength Potential difference
20 When a dielectric is inserted between the plates of a capacitor, Which one is true Energy stored increase Energy stored decrease Capacitance decrease All
21 Two charges of equal magnitudes and at a distance r exert a force F on each other. If the charges are halved and distance between them is doubled, then the new force acting on each charge is: F/8 F/4 F/16 4F
22 Charge on a capacitor is 50C. if voltage applied across its plates is 10V then its capacitance: 5F 0.02F 500F 0.2F
23 An electron is moving towards high potential. Its electrical P.E: Increases Remains constant Decrease May increase may decrease
24 A body gets positive charge. It means that: It has lost electrons It has gained positions It has gained protons It has gained 𝛼 −particles
25 A parallel plate air capacitor is charged and then isolated. When a dielectric material is inserted between the plates of the capacitor , then which of the following does not change: Electric field between the plates Charge on the plates Potential difference across the plate Energy stored in the capacitor
26 A charged conductor has charged on its: Outer surface Surrounding surface Inner surface Middle point
27 A soap bubble is give a negative charge, then its radius: Decrease Remains same Increases Bubble will disappear
28 Two point charges +2 coulombs and +6 coulombs repel each other with a force of 12 N if a charge -4 coulomb is given to each of these charges the force will be: 4N repulsive 8N repulsive 4N attractive 8N attractive
29 If the magnitude of charge on each of two objects is doubled and the distance between them is also doubled then force between them: Doubled Quadrupled Halved Remains same
30 Which one of the following statements regarding electrostatics is wrong? Charge is conserved Charge is quantized There is no field near an isolated charge at rest A moving charge produces both electric and magnetic fields
31 An electric field can deflect: X-rays Neutrons 𝛼 −particles 𝛾 −rays
32 If the distance between the plates of a parallel plates capacitor is increased, its potential will: Remain the same Increase Decrease Decrease exponentially
33 Capacitor stores energy in the form of : Electric field Both of these Magnetic field Gravitational field
34 The law, governing the force between electric charges is known as: Ampere’s law Ohm’s law Coulomb’s law Faraday’s law65y7uhnb
35 Between the plates of a parallel plate condenser there is 1mm thick paper of dielectric constant 4. Itis charged at 100 volt. The electric field in volt/meter between the plates of the capacitor is: 100 25000 100000 400000
36 The coulomb’s law is valid for the charges which are: Moving and point charges Stationary and point charges Moving and non-point charges Stationary and large size charges
37 The distance between the plates of a charged parallel plate capacitor is 4mm and potential difference is 6 volts. If the distance between the plates is increased to 12mm, then : The potential difference of the capacitor will become 18 volts The P.D become 20 volts The P.D will remain unchanged The charge on condenser will reduce to one third
38 The electron is a cathode-ray tube are accelerated from cathode to anode by a potential differenceof 2000 V. If this p.d is increased to 8000 V, the electrons will arrive at the anode with: Twice the kinetic energy and four times the velocity Four times the kinetic energy and twice the velocity Four times the kinetic energy and sixteen times the velocity Sixteen times the kinetic energy and four times the velocity
39 An organ pipe open at both ends and another organ pipe, closed at one end willresonate with each other, if their lengths are in ration of 1:1 1:4 2:1 1:2
40 The fundamental frequency of a closed organ pope is 50 Hz. The frequency ofsecond over tone is 100hz 150hz 60hz 250hz
Download This Set

Is this page helpful?