MCQ
2281. SI unit of electrical capacitance--
ohm
farad
henry
coulomb
2282. Resistance depends on:
Cross section
Length
Material
All
2283. Energy consumption of a 100-watt bulb for ten hours is
1000kWh
1 unit
100kWh
1kW
2284. Semiconductor-এর temperature coefficient of resistance--
Negative
Zero
Positive
কোনোটিই নয়
2285. What voltage drop will be there across a 1kW flood light whose resistance when hot is 40 Ω ?
100V
50V
150V
200V
2286. The basic unit of electric charge is-
Ampere-hour
Joule
Coulomb
Newton
2287. Unit of magnetic flux density-
tesla
lux
weber
henry
2288. An electric heater is marked 2000W, 200V; the resistance of the coil is--Ω
0.1
20
1/20
200
2289. Unit of electrical energy is:
Newton-meter
Watt-sec
Watt
BTU
2290. What type of material is Silicon (Si)?
Conductor
Semiconductor
Insulator
Good conductor
2291. 1 coulomb is equal to?
6.24 x 10^18 electron-charge
6.28 x 10^16 electron charge
682 x 10^18 electron charge
6.82 x 10^-18 electron change
2292. What is the resistance-power of an electric iron with 220V and 1100 watt?
11 Ω
33 Ω
22 Ω
44 Ω
2293. Which one is a semiconductor material?
Phosphorous
Silicon
Rubber
Aluminium
2294. Which of the following quantites consist of unit as WATT?
force
charge
current
power
2295. বাইনারি সংখ্যা 01100111-এর 2's কমপ্লিমেন্ট কত?
110001
01100001
10011001
10010010
2296. The unit of resistivity is-
Ohms
Ohm/Sqm
Ohm-m
None
2297. The minimum dielectric stress in a cable is at-
conductor
surface centre of conductor
lead sheath
none of the above
2298. The resistivity depends upon-
area
material
length
All of these
2299. How many 60-watt bulbs will be safe for a home with main meter of 6 amp and 220 volts?
6
10
11
22
2300. Which quantity consists of a unit 1 kWh?
energy
power
time
charge