ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

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ECAT Physics Chapter 12 Important MCQ's

Sr.#	Question	Answer
1	Specific resistance of a wire depends upon	A. Length B. Cross-section area C. Mass D. None
2	If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is	A. one ohm B. one joule C. one volt D. one ampere
3	Electric generators which convert mechanical energy into	A. solar energy B. thermal energy C. kinetic energy D. electrical energy
4	A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?	A. Zero B. 5μC m^-2 C. 20μC m^-2 D. 8μC m^-2
5	In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called	A. Time constant B. Decay constant C. None of these D. All of above
6	If the two charges in Coulomb's law have double distance between them, then electric force	A. Becomes two-fold B. Becomes four-fold C. Remains the same D. None of these
7	Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3N. The force between A and B when the charges on them are doubled and distance is halved	A. 1.92 N B. 19.2 N C. 12 N D. 0.192 N
8	The resistivity of a substance depends upon the	A. length B. mass C. area D. temperature
9	Resistance of a conductor depends upon	A. the quantity of current passing through it B. the voltage applied between its end C. its dimensions, physical state and nature of its material D. all of the above
10	A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?	A. Electric potential at the surface of the cube is zero B. Electric potential within the cube is zero C. Electric filed is normal to the surface of the cube D. Electric filed varies within the cube

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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

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

Thermocouple is an arrangement of two different metals

The energy stored in a charge capacitor

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

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

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

Capacitance of two or more capacitors

The electric intensity outside the two oppositely charged parallel metal plates is

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

One electron volt is equal to

The electric field due to an infinite long thin wire at a distance R varies as

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

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

Physicist George Simon ohm was a

A condenser of capacity 50μF is charged to 10 V.The energy stored is

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

The relation between charge 'Q' and current 'I' is given by

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

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

An electric charge at rest is

Which one of the following has larger value of relative permitivity Erat room temperature?

The resistance of an incandescent lamp is

Some charge is being given to a conductor. Then its potential

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

The charge carriers in electrolyte are positive and negative

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ECAT Physics Chapter 12 Important MCQ's

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

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is

A car battery has e.m.f 12 volt and internal resistance 5 x 10^-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

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

Which one of the following has larger value of relative permitivity E_rat room temperature?

What is the current is a 2 x 10⁶ohm resistor having a potential difference of 2 x 10³volts?