Chapter 20 – Heating Effects of Current and Instruments
Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 20 - Heating Effects of Current and Instruments
Figure shows three similar lamps L1 , L2 , and L3 connected across a power supply. If the lamp L3 fuses, how will the light emitted by L1 and L2 change?
06
Dec
Figure shows three similar lamps L1 , L2 , and L3 connected across a power supply. If the lamp L3 fuses, how will the light emitted by L1 and L2 change? and L3 connected across a power supply. If the lamp L3 fuses Figure shows three similar lamps L1 how will the light emitted by [...]
Two identical heaters rated 220 volt, 1000 watt are placed in series with each other across 220 volt lines , then the combined power is
06
Dec
Two identical heaters rated 220 volt, 1000 watt are placed in series with each other across 220 volt lines , then the combined power is 1000 watt are placed in series with each other across 220 volt lines then the combined power is Two identical heaters rated 220 volt December 6, 2020 Category: Cengage JEE [...]
A 25 W, 220 V bulb and a 100 W, 220 V bulb are connected in series across a 220 V line; which electric bulb will glow more brightly?
06
Dec
A 25 W, 220 V bulb and a 100 W, 220 V bulb are connected in series across a 220 V line; which electric bulb will glow more brightly? 220 V bulb and a 100 W 220 V bulb are connected in series across a 220 V line; which electric bulb will glow more brightly [...]
Two electric bulbs A and B are rated 60 and 100W, respectively. If they are connected in parallel to the same source , then
06
Dec
Two electric bulbs A and B are rated 60 and 100W, respectively. If they are connected in parallel to the same source , then respectively . If they are connected in parallel to the same source then Two electric bulbs A and B are rated 60 and 100W December 6, 2020 Category: Cengage JEE Mains [...]
The three resistance of equal value are arranged in the different combinations shown below. Arrange them in increasing order of power dissipation.
06
Dec
The three resistance of equal value are arranged in the different combinations shown below. Arrange them in increasing order of power dissipation. The three resistance of equal value are arranged in the different combinations shown below. Arrange them in increasing order of power dissipation. December 6, 2020 Category: Cengage JEE Mains Physics by B.M Sharma [...]
Four resistances carrying a current shown in figure are immersed in a box containing ice at 0^∘C. How much ice must be put in the box every 10 min to keep the average quantity of ice in the box constant? Latent heat of ice is 80calg^−1 .
06
Dec
Four resistances carrying a current shown in figure are immersed in a box containing ice at 0^∘C. How much ice must be put in the box every 10 min to keep the average quantity of ice in the box constant? Latent heat of ice is 80calg^−1 . All bulbs in the circuit shown in figure [...]
A battery of internal resistance 4 ohm is connected to the network of resistance as shown. In the order that the maximum power can be delivered to the network, the value of R in ohm should be
06
Dec
A battery of internal resistance 4 ohm is connected to the network of resistance as shown. In the order that the maximum power can be delivered to the network, the value of R in ohm should be A battery of internal resistance 4 ohm is connected to the network of resistance as shown. In the [...]
In the circuit shown in the figure the heat produced in the 5 ohm resistor due to the current flowing through it is 10 calories per second. The heat generated in the 4 ohm resistor is
06
Dec
In the circuit shown in the figure the heat produced in the 5 ohm resistor due to the current flowing through it is 10 calories per second. The heat generated in the 4 ohm resistor is In the circuit shown in the figure the heat produced in the 5 ohm resistor due to the current [...]
Three light bulbs of 40W, 60W and 100W are connected in series with a 240 volt source.
06
Dec
Three light bulbs of 40W, 60W and 100W are connected in series with a 240 volt source. 60W and 100W are connected in series with a 240 volt source. Three light bulbs of 40W December 6, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , Chapter 20 - Heating Effects of Current and Instruments [...]
Figure shows a network of three resistances. When some potential difference is applied across the network, thermal powers dissipated by A, B, and C are in the ratio
06
Dec
Figure shows a network of three resistances. When some potential difference is applied across the network, thermal powers dissipated by A, B, and C are in the ratio and C are in the ratio B Figure shows a network of three resistances. When some potential difference is applied across the network thermal powers dissipated by [...]