Here are the answers on the questions represented above. I thing you don't need detailed explanation because these are just general facts.
14. true
15. true
16.false
17. false, obviously there should be more for making a system
Toughest push and it’s didushehsuuahsydusuays
Answer:
option (a)
Explanation:
To make a galvanometer into voltmeter, we have to connect a high resistance in series combination.
The voltmeter is connected in parallel combination with teh resistor to find the voltage drop across it.
An ideal voltmeter has very high resistance that means it has a resistance as infinity.
Answer:
28.42°
Explanation:
Critical Angle:This is the incident angle at which the angle of refraction is 90° when light passes from denser to less dense medium
from Refraction,
1/n = sinc......... Equation 1
Where n = refractive index of the liquid, c = critical angle.
make c the subject of the equation
c = sin⁻¹(1/n)............. Equation 2
Given: n = 2.1
Substitute the value of n into equation 2
c = sin⁻¹(1/2.1)
c = sin⁻¹(0.476)
c = 28.42°
Hence the critical angle = 28.42°