Neha Jindal Solutions for Chapter: Magnetic Effects of Electric Current, Exercise 4: MOCK TEST QUESTION PAPER

Draw labelled diagram to show how an electromagnet is made.

What is the purpose of the soft iron core used in making an electromagnet?

(i) Name the electric device that converts mechanical energy into electrical energy. (ii)Write the principle involved in this device.

An electric geyser of $2 \mathrm{kW}$ rating is operated in a domestic circuit operating on $220 \mathrm{V}$ main supply that has a fuse of current rating of $5 \mathrm{A}$. What will be the outcome? Explain.

State the rule to find the direction of magnetic field associated with a current carrying conductor.

Two room heaters are marked $220 \mathrm{V}$, $500 \mathrm{W}$ and $220 \mathrm{V}$, $800 \mathrm{W}$ respectively. If the heaters are connected in parallel to $220 \mathrm{V}$ mains supply, calculate the current drawn by each heater.

Two room heaters are marked $220 \mathrm{V}$, $500 \mathrm{W}$ and $220 \mathrm{V}$, $800 \mathrm{W}$ respectively. If the heaters are connected in parallel to $220 \mathrm{V}$ mains supply, calculate the resistance of each heater.

Two room heaters are marked $220 \mathrm{V}$, $500 \mathrm{W}$ and $220 \mathrm{V}$, $800 \mathrm{W}$ respectively. If the heaters are connected in parallel to $220 \mathrm{V}$ mains supply, calculate total electric energy consumed in commercial units if they operate simultaneously for $2$ hours.