Neha Jindal Solutions for Chapter: Electricity, Exercise 2: Progress Check 2

An electric motor consumes $4$ units of electrical energy in two hours, at supply voltage of $220 \mathrm{V}$. Relate commercial unit of energy with its $\mathrm{SI}$ unit.

An electric motor consumes $4$ units of electrical energy in two hours, at supply voltage of $220 \mathrm{V}$. Convert the total number of units consumed into $\mathrm{SI}$ unit of energy.

An electric motor consumes $4$ units of electrical energy in two hours, at supply voltage of $220 \mathrm{V}$. Find the resistance of motor.

Observe the given circuit and answer the questions that follow:

What is the value of $\mathrm{R}$?

Observe the given circuit and answer the questions that follow:

Find the total equivalent resistance of the circuit.

Observe the given circuit and answer the questions that follow:

Through which part of the circuit will the current flow even if key is open?

An electric iron consumes energy at a rate of $840 \mathrm{W}$ when heating is at the maximum rate and $360 \mathrm{W}$ when heating is at the minimum. The voltage is $220 \mathrm{V}$. What are the current and the resistance in each case?

Give examples of devices based on heating effect of current.