ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

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Mehreen Ather 02 - Dec - 2024 30 Min 19 Sec 90/120
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Humera Noor 27 - Dec - 2024 19 Min 28 Sec 65/120

ECAT Physics Chapter 12 Important MCQ's

Sr.#	Question	Answer
1	Resistor is a device which convert electric energy to	A. Heat energy B. Chemical energy C. Elastic energy D. All of the above
2	Electron volt is the unit of	A. Potential difference B. Energy C. Resistance D. Capacitance
3	The capacitance of a parallel plate capacitor depends upon	A. Area of the plates B. Separation between the plates C. Medium between the plates D. All of the above
4	The ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately	A. 9.8 B. 24 x 10¹⁹ C. 24 x 10⁴² D. 24 x 10^-44
5	Magnetic effect at a point caused due to flow a current depend upon the	A. Quantity of current B. Distance from current C. Both the quantity of current and distance from current element D. None of the all
6	If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be	A. 1/3 V B. 2/3 V C. 3/2 V D. 3V
7	If electric and gravitational force on an electron in a uniform electric field will be	A. E=mg/q B. E=q/mg C. E=,g/q D. E=qg/m
8	Ohm's law states that	A. The current through a resistor is directly proportional to the applied voltage B. The voltage across a resistor is directly proportional to the current passing through it C. Resistance is the constant of proportionality between the voltage and current D. all of these
9	Solar cell converts sunlight directly into	A. potential energy B. thermal energy C. mechanical energy D. electrical energy
10	The resistance of the given conductor can be increased by	A. Increasing the area B. Changing resistivity C. Decreasing the length D. None of the above because change does not matter because in any case the volume remains the same

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ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 12 Electrostatics

Physics ECAT Pre Engineering Chapter 12 Electrostatics

Thermocouple is an arrangement of two different metals

The earth's potential is taken as

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

Electron volt is the unit of

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

The electrode connected with the positive terminal of the current source is called

When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

The energy stored in a charge capacitor

The resistivity of a substance depends upon the

Magnetic effect at a point caused due to flow a current depend upon the

The resistance of a conductor does not depend on its

The potential difference across each resistance in series combination is

The speed of randomly moving electrons depends upon

Which of the following does not obey ohm's law?

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Coulomb's force between two point charges depends upon

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

The SI unit of conductivity is

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

At any point on the right bisector of the line joining two equal and opposite charges

The SI unit of current is

The graphical representation of ohm's law is

The concept of field theory was put forward by

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

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ECAT Physics Chapter 12 Important MCQ's

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A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?

Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then

The ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately