Advertisements
Advertisements
प्रश्न
Three heaters each rated 250 W, 100 V are connected in parallel to a 100 V supply. The resistance of each heater
Advertisements
उत्तर
Given ,
Power , P = 250 W
Voltage , V = 100 V
Resistance for each heaters `"R" = "V"/"I"`
`= 100/2.5 = 40 Omega`
संबंधित प्रश्न
An electric circuit consisting of a 0.5 m long nichrome wire XY, an ammeter, a voltmeter, four cells of 1.5 V each and a plug key was set up.
(i) Draw a diagram of this electric circuit to study the relation between the potential difference maintained between the points 'X' and 'Y' and the electric current flowing through XY.
The figure given below shows an electric circuit in which current flows from a 6 V battery through two resistors.
- Are the resistors connected in series with each other or in parallel?
- For each resistors, state the p.d. across it.
- The current flowing from the battery is shared between the two resistors. Which resistor will have bigger share of the current?
- Calculate the effective resistance of the two resistors.
- Calculate the current that flows from the battery.
For a heater rated at 4 kW and 220 V, calculate:
(a) the current,
(b) the resistance of the heater,
(c) the energy consumed in 2 hours, and
(d) the cost if 1 kWh is priced at Rs 4.60.
Tick(✓) the correct choice in the following:
When the length of a conductor is doubled the resistance of the conductor
will
Find the effective resistance in the following circuit diagrams (Fig.):
Find the effective resistance in the following circuit diagrams (Fig.):
What is the function of a step-up transformer?
A bulb is connected to a battery of p.d. 4 V and internal resistance 2.5 Ω . A steady current of 0.5 A flows through the circuit. Calculate:
The resistance of the bulb
