Chapter 20 – Heating Effects of Current and Instruments
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Two identical batteries, each of emf 2V and internal resistance 1Ω, are available to produce heat in an external circuit. What is the maximum rate of production of heat that can be obtained in the external circuit will be
06
Dec
Two identical batteries, each of emf 2V and internal resistance 1Ω, are available to produce heat in an external circuit. What is the maximum rate of production of heat that can be obtained in the external circuit will be are available to produce heat in an external circuit. What is the maximum rate of production [...]
The circuit shown in Fig. contains a battery, a rheostat and two identical lamps. What will happen to the brightness of the lamps if the resistance of the rheostat is increased?
06
Dec
The circuit shown in Fig. contains a battery, a rheostat and two identical lamps. What will happen to the brightness of the lamps if the resistance of the rheostat is increased? a rheostat and two identical lamps. What will happen to the brightness of the lamps if the resistance of the rheostat is increased? The [...]
Three similar light bulbs are connected to a constant to a constant voltage dc supply as shown in `Fig . Each bulb operates at normal brightness and the ammeter ( of negligible resistance) registers a steady current. The filament of one of the bulbs breaks. What happens to the ammeter reading and to the brightness of the remaining bulbs?
06
Dec
Three similar light bulbs are connected to a constant to a constant voltage dc supply as shown in `Fig . Each bulb operates at normal brightness and the ammeter ( of negligible resistance) registers a steady current. The filament of one of the bulbs breaks. What happens to the ammeter reading and to the brightness [...]
All bulbs in the circuit shown in figure are identical. Which bulb glows most brightly?
06
Dec
All bulbs in the circuit shown in figure are identical. Which bulb glows most brightly? All bulbs in the circuit shown in figure are identical. Which bulb glows most brightly? December 6, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , Chapter 20 - Heating Effects of Current and Instruments ,
Three bulbs B1 , B2 and B3 are connected to the mains as shown in the figure. How will the brightness of the bulb B1 be affected, if one of the bulb B2 or B3 is disconnected from the circuit
06
Dec
Three bulbs B1 , B2 and B3 are connected to the mains as shown in the figure. How will the brightness of the bulb B1 be affected, if one of the bulb B2 or B3 is disconnected from the circuit B2 and B3 are connected to the mains as shown in the figure. How will [...]
Three identical cells, each having an e.m.f. of 1.5 V and a constant internal resistance of 2.0Ω, are connected in series with a 4.0 Ω resistance R, first as in circuit (1), and second as in circuit (ii). what is the ratio Power in R in circuit (ii)/Power in R in circuit (i) ?
06
Dec
Three identical cells, each having an e.m.f. of 1.5 V and a constant internal resistance of 2.0Ω, are connected in series with a 4.0 Ω resistance R, first as in circuit (1), and second as in circuit (ii). what is the ratio Power in R in circuit (ii)/Power in R in circuit (i) ? [...]
In the circuit in Fig., bulb `B` does not glow although ammeter `A` indicates that the current is flowing . Why does the bulb not glow?
06
Dec
In the circuit in Fig., bulb `B` does not glow although ammeter `A` indicates that the current is flowing . Why does the bulb not glow? bulb `B` does not glow although ammeter `A` indicates that the current is flowing . Why does the bulb not glow? In the circuit in Fig. December 6, 2020 [...]
A potentiometer arrangement is shows in Fig. 6.62. The driver cell has emf e and internal resistance r. The resistance of potentiometer wire AB is R.F is the cell of emf e/3 and internal resistance r/3. Balance point (J) can be obtained for all finite value of
06
Dec
A potentiometer arrangement is shows in Fig. 6.62. The driver cell has emf e and internal resistance r. The resistance of potentiometer wire AB is R.F is the cell of emf e/3 and internal resistance r/3. Balance point (J) can be obtained for all finite value of If a shunt 1/10 of the coil resistance [...]
In Fig.` the voltmeter and ammeter shows are ideal. Then voltmeter and ammeter readings, respectively, are
06
Dec
In Fig.` the voltmeter and ammeter shows are ideal. Then voltmeter and ammeter readings, respectively, are are In Fig.` the voltmeter and ammeter shows are ideal. Then voltmeter and ammeter readings respectively December 6, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , Chapter 20 - Heating Effects of Current and Instruments ,
Three voltmeters are connected as shown. A potential difference has been applied between A and B. On closing the switch S, readings of voltmeters?
06
Dec
Three voltmeters are connected as shown. A potential difference has been applied between A and B. On closing the switch S, readings of voltmeters? readings of voltmeters ? Three voltmeters are connected as shown A potential difference has been applied between A and B. On closing the switch S December 6, 2020 Category: Cengage JEE [...]