Physics

If a wire of resistnace R is melted and recasted to half of its length, then the new resistance of the wire will be If a wire of resistnace R is melted and recasted to half of its length then the new resistance of the wire will be August 18, 2020 Category: Chapter 22 - [...]

There are three copper wires of length and cross-sectional area (L, A), (2 L, A/2) (L/2, 2A). In which case is the resistance minimum ? (2 L 2A). In which case is the resistance minimum ? A) A/2) (L/2 There are three copper wires of length and cross-sectional area (L August 18, 2020 Category: Chapter [...]

The resistance of the discharge tube is The resistance of the discharge tube is August 18, 2020 Category: Chapter 22 - Current Electricity , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,

Which of the following statements is true for nuclear forces ? Which of the following statements is true for nuclear forces ? August 17, 2020 Category: Chapter 31 - Nuclei , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,

Potentiometer measures the potential difference more accurately than a voltmeter, because because Potentiometer measures the potential difference more accurately than a voltmeter August 17, 2020 Category: Chapter 22 - Current Electricity , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,

Two batteries of emf 4 V and 8 V with internal resistance 1 Ω and 2 Ωare connected in a circuit with a resistance of 9 Ω as shown in figure. The current and potential difference between the points P and Q are For a cell the internal resistance (r) of cell is the terminal [...]

For a cell, the terminal potential difference is 2.2 V when circuit is open and reduces to 1.8 V when cell is connected to a resistance R = 5 Ω, the internal resistance (r) of cell is For a cell the internal resistance (r) of cell is the terminal potential difference is 2.2 V when [...]

A battery is charged at a potential of 15 V for 8 h when the current flowing is 10 A. The battery on discharge supplies a current of 5 A for 15 h. The mean terminal voltage during discharge is 14 V. The watt- hour efficiency of the battery is In a Wheatstone bridge resistance [...]

The electric field in a certain region is acting radially outwards and is given by E=Ar. A charge contained in a sphere of radius ′a′ centered at the origin of the field, will given by The electric field in a certain region is acting radially outwards and is given by E=Ar. A charge contained in [...]

When three identical bulbs of 60watt, 200volt rating are connected in series to a 200volt supply, the power drawn by them will be 200volt rating are connected in series to a 200volt supply the power drawn by them will be When three identical bulbs of 60watt August 17, 2020 Category: Chapter 20 - Electric Field [...]