Part 2
Two electric bulbs rated at 25 W, 220 V and 100 W, 220 V are connected in series across a 220 V voltage source. The 25 W and 100 W bulbs now draw P1 and P2 powers respectively
02
Dec
Two electric bulbs rated at 25 W, 220 V and 100 W, 220 V are connected in series across a 220 V voltage source. The 25 W and 100 W bulbs now draw P1 and P2 powers respectively 220 V and 100 W 220 V are connected in series across a 220 V voltage source. [...]
An electric bulb rated for 500W at 100V is used in circuit having 200V supply. What resistance R that must be put in series with the bulb, so that the bulb delivers 500 W.
02
Dec
An electric bulb rated for 500W at 100V is used in circuit having 200V supply. What resistance R that must be put in series with the bulb, so that the bulb delivers 500 W. An electric bulb rated for 500W at 100V is used in circuit having 200V supply. What resistance R that must be [...]
Two identical batteries each of emf E=2 volt and internal resistance r=1.0 ohm are available to produce heat in an external resistance R = 0.5 ohm by passing a current through it. The maximum Joulean power that can be developed across R using these batteries is
02
Dec
Two identical batteries each of emf E=2 volt and internal resistance r=1.0 ohm are available to produce heat in an external resistance R = 0.5 ohm by passing a current through it. The maximum Joulean power that can be developed across R using these batteries is The power dissipated 6 ohm resistor is December 2, [...]
Three equal resistance, each of R ohm, are connected as shown in the figure. A battery of 2V and of internal resistance 0.1 ohm is connected across the circuit. The value of R for which the heat generated in the circuit maximum will be
02
Dec
Three equal resistance, each of R ohm, are connected as shown in the figure. A battery of 2V and of internal resistance 0.1 ohm is connected across the circuit. The value of R for which the heat generated in the circuit maximum will be are connected as shown in the figure. A battery of 2V [...]
If power in external resistance R is maximum, then
02
Dec
If power in external resistance R is maximum, then If power in external resistance R is maximum then December 2, 2020 Category: Cengage NEET by C.P Singh , Chapter 3 - Current Electricity , Part 2 ,
Current i is being driven through a cell of emf ε and internal resistance r, as shown (i) the cell absorbs energy at rate of εi (ii) The cell stores chemical energy at the rate of (εi−i^2r) (iii) The potential difference across the cell is ε+ir (iv) some heat is produced in the cell
02
Dec
Current i is being driven through a cell of emf ε and internal resistance r, as shown (i) the cell absorbs energy at rate of εi (ii) The cell stores chemical energy at the rate of (εi−i^2r) (iii) The potential difference across the cell is ε+ir (iv) some heat is produced in the cell Current [...]
A cell of emf ‘E’ and internal resistance ‘r’ drives a current i through an external resistance R.
02
Dec
A cell of emf ‘E’ and internal resistance ‘r’ drives a current i through an external resistance R. A cell of emf 'E' and internal resistance 'r' drives a current i through an external resistance R. December 2, 2020 Category: Cengage NEET by C.P Singh , Chapter 3 - Current Electricity , Part 2 ,
Two resistors having equal resistances are joined in series and a current is passed through the combination. Neglect any variation in resistance as the temperature changes. In a given time interval,
02
Dec
Two resistors having equal resistances are joined in series and a current is passed through the combination. Neglect any variation in resistance as the temperature changes. In a given time interval, Two resistors having equal resistances are joined in series and a current is passed through the combination. Neglect any variation in resistance as the [...]
The charge flowing in a conductor varies with times as Q=at−bt^2. Then, the current 1. decreases linearly with time 2. reaches a maximum and then decreases 3. falls to zero at time t=a/2b 4. changes at a rate – 2b
02
Dec
The charge flowing in a conductor varies with times as Q=at−bt^2. Then, the current 1. decreases linearly with time 2. reaches a maximum and then decreases 3. falls to zero at time t=a/2b 4. changes at a rate – 2b The charge flowing in a conductor varies with times as Q=at−bt^2. Then the current 1. [...]
Three resistances A, B and C have values 3R, 6R and R respectively. When some potential difference is applied across the network the thermal power dissipated by A, B and C are in ratio:
02
Dec
Three resistances A, B and C have values 3R, 6R and R respectively. When some potential difference is applied across the network the thermal power dissipated by A, B and C are in ratio: 6R and R respectively. When some potential difference is applied across the network the thermal power dissipated by A B and [...]