Science Questions

What is the resistance of an electric toaster rated 1000W at 250V?

If three resistors of 2 Ohms, 3 Ohms, and 5 Ohms are connected in series, what is the current through the 3 Ohm resistor when connected to a 20V battery?

The resistivity of a wire depends on its:

When the temperature of a metallic conductor increases, its resistance usually:

In a parallel circuit, if one bulb blows out, the other bulbs will:

An ideal ammeter should have ________ resistance.

An ideal voltmeter should have ________ resistance.

Calculate the power of a motor that takes 5 Amperes from a 220V line.

Which of the following describes Faraday's law of electromagnetic induction?

In Fleming's Left Hand Rule, the middle finger represents the direction of:

What is the function of a commutator in a DC motor?

The EMF of a cell depends on:

If four cells each of 1.5V are connected in series, the total EMF is:

Why is the core of a transformer laminated?

If the cost of electricity is Rs. 10 per unit, how much does it cost to run a 2kW heater for 5 hours?

Which property of a wire is used in making the heating element of an electric kettle?

Two resistors of 6 Ohms and 12 Ohms are in parallel. What is their effective resistance?

What happens to the magnetic field strength of a solenoid if the number of turns per unit length is increased?

The unit of resistivity is:

Which of the following is used to convert an AC voltage into a different AC voltage level?