Cengage JEE Mains Physics by B.M Sharma
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 [...]
Resistors P, Q, and R in the circuit have equal resistances. If the battery is supplying a total power of 12 W, what is the power dissipated as heat in resistor R?
06
Dec
Resistors P, Q, and R in the circuit have equal resistances. If the battery is supplying a total power of 12 W, what is the power dissipated as heat in resistor R? -q and R in the circuit have equal resistances. If the battery is supplying a total power of 12 W Resistors P what [...]
The main supply voltage to room is 120V. The resistance of the lead wires is 6Ω. A 60W bulb is already giving light. What is the decrease of voltage across the bulb, when a 240W heater is switched on ?
06
Dec
The main supply voltage to room is 120V. The resistance of the lead wires is 6Ω. A 60W bulb is already giving light. What is the decrease of voltage across the bulb, when a 240W heater is switched on ? The main supply voltage to room is 120V. The resistance of the lead wires is [...]
A heater is designed to operate with a power of 1000W in a 100V line. It is connected in combination with a resistance of 10Ω and a resistance R, to a 100V mains as shown in figure. What will be the value of R so that the heater operates with a power of 62.5W?
06
Dec
A heater is designed to operate with a power of 1000W in a 100V line. It is connected in combination with a resistance of 10Ω and a resistance R, to a 100V mains as shown in figure. What will be the value of R so that the heater operates with a power of 62.5W? A [...]
A torch bulb rated 4.5 W, 1.5 V is connected as in figure. The emf of the cell needed to make the bulb glow at full intensity is
06
Dec
A torch bulb rated 4.5 W, 1.5 V is connected as in figure. The emf of the cell needed to make the bulb glow at full intensity is 1.5 V is connected as in figure. The emf of the cell needed to make the bulb glow at full intensity is A torch bulb rated 4.5 [...]
Three 10Ω,2W resistors are as in figure. The maximum possible voltage between points A and B without exceeding the power dissipation limits of any of the resistors is
06
Dec
Three 10Ω,2W resistors are as in figure. The maximum possible voltage between points A and B without exceeding the power dissipation limits of any of the resistors is 2W resistors are as in figure. The maximum possible voltage between points A and B without exceeding the power dissipation limits of any of the resistors is [...]
An electric bulb rated for 500W at 100V is used in circuit having 200V supply. The resistance R that must be put in series with the bulb, so that the bulb draws 500 W is
06
Dec
An electric bulb rated for 500W at 100V is used in circuit having 200V supply. The resistance R that must be put in series with the bulb, so that the bulb draws 500 W is An electric bulb rated for 500W at 100V is used in circuit having 200V supply. The resistance R that must [...]