Physics Practice: Current Electricity (Mock Test 4 - Expert Level)
1. Expert Analysis: A wire of resistance $R$ is cut into three equal parts. These parts are then connected in parallel. The new equivalent resistance is:
2. Clinical Logic: Why is the internal resistance of a secondary cell (like a lead accumulator) much lower than a primary cell?
3. Data-Based: A cell of e.m.f. $2.0 \text{ V}$ and internal resistance $0.1\Omega$ is connected to a $3.9\Omega$ external resistor. The terminal voltage of the cell is:
4. Experimental Setup: When the current through an Ohmic conductor is doubled, the rate of heat production becomes:
5. Which of the following statements correctly differentiates between e.m.f. and Terminal Voltage?
6. A $60 \text{ W}$ bulb and a $100 \text{ W}$ bulb are connected in series to the mains. Which bulb will glow brighter?
7. The slope of a $V-I$ graph (with $V$ on y-axis) for an Ohmic conductor represents:
8. A piece of wire of resistance $R$ is cut into $n$ equal parts. These parts are then connected in parallel. The equivalent resistance is:
9. "Super-Ohmic" or non-ohmic behavior is shown by a vacuum tube because:
10. Expert Logic: If a fuse wire is made of an alloy of Lead and Tin, it should have:
