Question Text
Question 1 :
A circuit consisting of a battery of three cells of 2 V each, a 5 Ω resistor, an 8 Ω resistor, and a 12 Ω resistor, and a plug key, all connected in series. If the voltmeter is connected across 12 Ω resistor,what would be the readings in voltmeter?
Question 2 :
A battery of 9 V is connected in series with resistors of 0.2 ohm, 0.3 ohm, 0.4 ohm, 0.5 ohm and 12 ohm, respectively. Find total resistance.
Question 3 :
When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.
Question 5 :
Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source?
Question 6 :
An electric refrigerator rated 400 W operates 8 hour/day. What is the cost of the energy to operate it for 30 days at Rs 3.00 per kW h?
Question 7 :
An electric lamp of 100 Ω, a toaster of resistance 50 Ω, and a water filter of resistance 500 Ω are connected in parallel to a 220 V source. What is the current through the electric iron if it is connected to the same source that and takes as much current as all three appliances?
Question 8 :
An electric heater of resistance 8 Ω draws 15 A from the service mains 2 hours. What is the rate at which heat is developed in the heater?
Question 9 :
How many 176 ohm resistors (in parallel) are required to carry 5 A on a 220 V line?
Question 10 :
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Above image is the symbol of ______ in circuit diagram.