Quizap

A battery of 10 volt carries 20,000 C of charge through a resistance of 20 Ω. The work done in 10 seconds is

• 2 × 103 joule

• 2 × 105 joule

• 2 × 104 joule

• 2 × 102 joule

A boy records that 4000 joule of work is required to transfer 10 coulomb of charge between two points of a resistor of 50 Ω. The current passing through it is

• 2 A

• 4A

• 8A

• 16 A

to get 2 Ω resistance using only 6 Ω resistors, the number of them required is

• 2

• 3

• 4

• 6

Two devices are connected between two points say A and B in parallel. The physical quantity that will remain the same between the two points is

• current

• voltage

• resistance

• None of the above

The least resistance obtained by using 2 Ω, 4 Ω, 1 Ω and 100 Ω is

• < 100 Ω

• < 4 Ω

• < 1 Ω

• > 2 Ω

When there is an electric current passing through a wire, the particles moving are ______

• Electrons

• Protons

• Atoms

• Ions

An electric appliance with a current of I and a resistance of R converts energy to other forms at a rate of P when connected to a 120 V outlet. What would be the new

power rating (in terms of P) if resistance is doubled (same 120 V outlet is used)?

• P

• 2P

• P/2

• 4P

he resistance of a metallic wire becomes 8 times when

• length is doubled

• length is tripled

• length is 4* and radius is halved

• length is halved and radius is doubled

A uniform wire of resistance 9Ω having resistance 1Ω/m is bent in the form of a circle as shown in figure. If the equivalent resistance between P & Q is 2Ω, what is the length of shorter section

• 4m

• 3m

• 6m

• 2m