Science Questions

Which of the following does NOT affect the resistance of a conductor?

A step-up transformer increases the:

What is the direction of conventional current?

What is the resistance of an ideal ammeter?

Which of these is used to change the voltage in an AC circuit?

What is the purpose of grounding (earthing) an appliance?

The SI unit of resistivity is:

Which law describes the heat produced in a conductor due to current?

What type of current is supplied by a battery?

If the resistance of a circuit is doubled while the voltage remains the same, the current will:

Which rule is used to find the direction of force on a current-carrying conductor in a magnetic field?

Which of the following describes a parallel circuit?

What is the main advantage of using an MCB over a fuse?

In a household circuit, how are all the bulbs and fans connected?

A flow of 1 ampere corresponds to how much charge per second?

Calculate the resistance of a lamp that draws 0.5 A current from a 220 V source.

Three resistors of 2 Ohms, 4 Ohms, and 6 Ohms are connected in series. What is the equivalent resistance?

Two resistors of 10 Ohms and 10 Ohms are connected in parallel. What is their combined resistance?

If the length of a wire is doubled and its cross-sectional area is kept constant, its resistance will:

Calculate the power of an appliance that consumes 3600 J of energy in 1 minute.