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	Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become	A. -10 N B. +10 N C. +20 N D. -20 N
2	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	A. 7.20 N B. 11.25 N C. 22.50 N D. 45.00
3	A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then	A. The charge in the plates reduces and potential difference increase B. Potential difference between the plates increase, stored energy decreases and charge remains the same C. Potential difference between the plates decreases and charge remains unchanged D. None of the above
4	The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be	A. 1 : 2 B. 2 : 1 C. 1 : 4 D. 4 : 1
5	If the distance of separation between two chares is increased, the electrical potential energy of the system will	A. Increase B. Decrease C. May increase or decrease D. Remain the same
6	Coulomb's force between two point charges depends upon	A. Magnitude of charges B. Distance between them C. Medium in which they are located D. All of the above
7	One coulomb of charge is created by	A. 10 electrons B. 1.6 x 10^-19electrons C. 6.25 x 10¹⁸electrons D. 6.25 x 10²¹electrons
8	The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is	A. 4/5Ω B. 5/4Ω C. 20Ω D. 0.05 Ω
9	A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J	A. 5 B. 0.5 C. 0.005 D. 50
10	The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is	A. 10Ω B. 20Ω C. 30Ω D. 40Ω

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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 SI unit of current is

Capacitance of two or more capacitors

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

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 energy stored in a charge capacitor

Which one of the following is the unit of electric field intensity

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

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

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

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

The ohm's is defined as

Cause of heat production in a current carrying conductor is

The nature of capacity of electrostatic capacitor depends on

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, 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 energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

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

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Ohm is the unit of

The thermistors are usually made of

Ohm established a relation between

If a 40 watt light bulb burns for 2 hours. how much heat is generated

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

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

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

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ECAT Physics Chapter 12 Important MCQ's

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Taking the earth to be a spherical conductor of diameter 12.8 x 10³km. Its capacity will be

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

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10^-19N, is