What is the inductance (L) of an inductor whose reactance is 1Ω at 50/ π hertz (H)?
100 H
0.01H
10H
1H
Correct answer is B
XL = WL = 2πFL (w = 2πf)
XL = reactance inductor (S.I unit Ω)
L = inductance (L) in Henry
XL = 1Ω, f = 50/π, L = ?
1 = 2× π × 50/π × L
1 = 100L
i.e. 100L = 1
L = 1/100
0.01H
∴ Inductance (L) of a inductor = 0.01H
There is an explanation video available below.
The direction of the path taken by light is called
Locus
Lines
Ray
Beam
Correct answer is C
Ray – a beam of light or radiation
There is an explanation video available below.
P1V1= P2V2
V1 = V2 ÷ T1T2
P1T1 = P2T2
P1V1 ÷ T1 = P1V1 ÷ T2
Correct answer is A
Boyle‘s law stats that the volume of a given mass of a gas, at a constant temperature is inversely proportional to us pressure.
Mathematically
V ∝ l/p, v = k/p (where k is constant)
K = VP
Let k = k1
Then, if k = k, V and P = V1P1
V1P1 = V2P2
There is an explanation video available below.
36.2cm3
25.7cm3
72.8cm3
24.3cm3
Correct answer is C
General formular of Gas laws
(P1V1) ÷ T1= (P2V2) ÷ T2
P1 = 800mmHg, V, = 76cm3, Tr = 273 + 27 = 300k
P2 = 760mmHg, V2 = ? T2= 273 + 0 = 273
(800 × 76) ÷ 300 = (760 × V2) ÷ 273
V2 = (300 × 76 × 273) ÷ (300 × 760) = 72.8 cm3
The volume of gas as S.T.P = 72.8 cm3
There is an explanation video available below.
P - 4 and Q + 2
P - 4 and Q - 2
P + 2 and Q + 2
P + 2 and Q - 2
Correct answer is B
No explanation has been provided for this answer.