Home
About Us
Contact Us
Privacy Policy
Search
Home
→
Basic Electrical Mcqs
→
If/, R and t are the current, resistance and time respectively, then according to Joule’s law heat produced will be proportional to_______________?
Related MCQs
A thermistor has__________?
With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals__________?
The number of electrons in the outer most orbit of carbon atom is__________?
The ratio of mass of proton to that of electron is nearly__________?
Voltage dependent resistors are used__________?
Voltage dependent resistors are usually made from__________?
All good conductors have high__________?
are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators__________?
An open resistor, when checked with an ohm-meter reads__________?
A rheostat differs from potentiometer in the respect that it__________?
Which of the following statement is correct__________?
The condition for the validity under Ohm’s law is that__________?
When current flows through heater coil it glows but supply wiring does not glow because__________?
Temperature co-efficient of resistance is expressed in terms of__________?
A nichrome wire used as a heater coil has the resistance of 2 £2/m. For a heater of 1 kW at 200 V, the length of wire required will be__________?
Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be__________?
Ohm’s law is not applicable to__________?
Which method can be used for absolute measurement of resistances __________?
Three 6 ohm resistors are connected to form a triangle. What is the resistance between any two corners __________?
Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be__________?
International ohm is defined in terms of the resistance of__________?
A substance whose molecules consist of dissimilar atoms is called__________?
A field of force can exist only between__________?
When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will__________?
Copper wire of certain length and resistance is drawn out to three times its length without change in volume, the new resistance of wire becomes__________?
74. Sparking occurs when a load is switched off because the circuit has high_________?
Switching of a lamp in house produces noise in the radio. This is because switching operation produces________?
For testing appliances, the wattage of test lamp should be__________?
Bulbs in street lighting are all connected in__________?
When electric current passes through a bucket full of water, lot of bubbling is observeD. This suggests that the type of supply is__________?
In the case of direct current__________?
Two lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct ?
In a lamp load when more than one lamp are switched on the total resistance of the load__________?
When one leg of parallel circuit is opened out the total current will__________?
It becomes more difficult to remove__________?
Whether circuit may be AC. or D. C. one, following is most effective in reducing the magnitude of the current?
A glass rod when rubbed with silk cloth is charged because__________?
Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as________?
When electric current passes through a metallic conductor, its temperature rises. This is due to__________?
If the efficiency of a machine is to be high, what should be low __________?
Resistance of a material always decreases if__________?
Electric current passing through the circuit produces__________?
An electric filament bulb can be worked from__________?
In an electric kettle water boils in 10 m minutes. It is required to boil the boiler in 15 minutes, using same supply mains__________?
A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will__________
Which of the following quantities remain the same in all parts of a series circuit __________?
The thickness of insulation provided on the conductor depends on__________?
The insulation on a current carrying conductor is provided__________?
The hot resistance of the bulb’s filament is higher than its cold resistance because the temperature co-efficient of the filament is__________?
A closed switch has a resistance of__________?
Two resistances Rl and Ri are connected in series across the voltage source where Rl>Ri. The largest drop will be across__________?
If/, R and t are the current, resistance and time respectively, then according to Joule’s law heat produced will be proportional to_______________?
A. I2Rt
B. I2Rf
C. I2R2t
D. I2R2t*
Correct Answer:
I2Rt
✔
Last Updated:
June 28, 2018