Science Questions

The heating element of an electric iron is made of:

The commercial unit of electrical energy is:

A step-up transformer increases the:

The magnetic effect of electric current was first discovered by:

An electric generator works on the principle of:

One kilowatt-hour (1 kWh) is equal to how many Joules?

If two 10 Ohm resistors are connected in series, the total resistance is:

A volt-meter is always connected in ________ with the component to measure potential difference.

The core of an electromagnet is typically made of:

What happens to the resistance of a wire if its length is doubled?

The primary purpose of earthing an electrical appliance is to:

What type of current is obtained from a dry cell battery?

The rate of flow of electric charge is called:

The property of a material to oppose the flow of current is:

A resistor has a resistance of 5 Ohms. If a potential difference of 10 Volts is applied across it, what is the current?

Which rule is used to find the direction of magnetic field around a straight current carrying conductor?

Which of the following is an example of a secondary cell?

Calculate the equivalent resistance of two 4 Ohm resistors connected in parallel.

A 100 Watt bulb is used for 10 hours daily. How many 'units' of electricity does it consume in one day?

A transformer has 200 turns in the primary coil and 1000 turns in the secondary coil. If the primary voltage is 220V, what is the secondary voltage?