Questions asked
Ravindra Samadiya
Numerade educator
We have four resistors A ,B ,C and D of resistance 4 ohm,8 ohm ,12 ohm and 24 ohm respectively then Lowest resistance which can be obtained by combining these four resistors
There are m resistor each of resistance R. First they all are connected in series and equivalent resistance is X. Now they are connected in parallel and equivalent resistance is Y. What is the ratio of X and Y?
A wire of length 3 m and area of cross-section 1.7 × 10-6 m2 has a resistance 3 × 10-2 ohm. a. What is the formula for resistivity of the wire and what is the unit of it b. Calculate the resistivity of the wire
A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R ′ , then the ratio R/R ′ is –
A wire is stretched so that its length becomes 6/5 times of its original length. If its original resistance is 25 Ω find its new resistance. Give justification for your answer in each case.
How is the resistance of a wire affected if: (i) its length is doubled (ii) its radius is doubled?
What would be the resistance of a resistor if the current flowing through it is 0.15 A when the potential difference across it is 1.05 V?
Kamlesh Goyal
If the wavelength of red light in air is 7500Ã… , then the frequency of light in air i will be ?
Radiations of intensity 0.5 W/m2 are striking a metal plate. The pressure on the plate will be ?
A parallel plate capacitor is charged to 60uC. Due to a radioactive source, the plate loses charge at the rate of 18×10–8C/s. The magnitude of displacement current will be ?