Statement I: A Wheatstone bridge is used for accurate measurement of unknown electrical resistance. Statement II: It consists of four resistors arranged in a…
At a specified temperature, consider these statements. Statement I: Resistance of a wire depends on its length and cross-sectional area. Statement II: Resistivity is…
Statement I: Nichrome has a higher resistivity than silver, chromium, and iron. Statement II: Materials with high resistivity are commonly used as heating elements…
In the usual horizontal-plane neutral-point experiment with a bar magnet: Assertion (A): The resultant horizontal magnetic field is zero at a neutral point. Reason…
An east–west straight conducting rod moves vertically upward in a magnetic field directed north. In a suitable closed circuit, what is the direction of…
For a uniform wire at unchanged temperature and cross-sectional area across a fixed voltage: Assertion (A): Doubling the wire length decreases the ammeter reading.…
Four identical resistors, each of resistance R, are connected only in series and/or parallel, with every resistor used and none bypassed. Which equivalent resistance…
Using the simplified school-level bar-magnet model of Earth and neglecting magnetic declination, which statements are correct? I. Away from nearby interfering magnetic fields, a…
