Physics Practice: Electricity and Magnetism (Mock Test 4 - Expert)
1. In an expert physics trial, a magnetic material is placed in a solenoid. If the current is switched off and the material retains almost all its magnetism, it is classified as a:
2. Two resistors $R_1$ and $R_2$ are connected in series. If $R_1 > R_2$, which resistor will dissipate more heat energy when current flows?
3. The magnetic field lines around a straight current-carrying conductor are in the form of:
4. "Electromotive Force" (EMF) is measured in Volts. It represents the ________ per unit charge.
5. A compass needle placed near a wire shows deflection only when the circuit is closed. This proves:
6. If three identical cells of $1.5\text{ V}$ each are connected in parallel, the total EMF of the battery is:
7. To increase the sensitivity of an electric bell, the iron armature should be made ________.
8. The "Angle of Dip" at the magnetic poles of the Earth is:
9. Which of the following expert safety practices is essential for high-power appliances like air conditioners?
10. The resistivity of a material depends on:
11. A fuse wire is usually made of an alloy of ________.
12. The magnetic field lines inside a solenoid are ________.
13. In a domestic circuit, the color of the insulation for the 'Live' wire is typically ________.
14. When two resistors are in parallel, the effective resistance is ________ than the smallest individual resistance.
15. The expert term for losing magnetism due to improper storage is: