Plane mirror always forms an image of same size as that of object
Concave mirror can form a virtual image that is greater than the size of object
convex mirror will always form a virtual image that is smaller in size
So overall for closer look during shaving in mirror we need a mirror that will form virtual image of greater size
So here correct answer would be
<em>A concave mirror is used.</em>
for this purpose the person should be closer to mirror as we know that image will be virtual and magnified only when the object is between focus and pole of the mirror
Answer:
Explanation:
Given,
Number of turns, N = 645 N
Area, A = 20.25 m²
Earth Magnetic field, B = 5 x 10⁻⁵ T
Maximum Emf = 1.25 V.
Angular velocity, ω = ?
Using Induced Emf formula
Angular velocity of the coil =
Answer:
7.13559 knots
Explanation:
Maximum power = 10.5 kilowatts
where,
P = Power in kilowatts
s = Desired speed in knots
Here, P = 10.5 kW
The greatest speed of the Olympians was 7.13559 knots
Answer:
β = 88°
Explanation:
Given,
Angle between the mirror, α = 46.0 °
Let 'i' and 'r' be the angle made with mirror by incident and reflected ray respectively.
Now,
α + i + r = 180°
i + r = 180°-46°
i + r = 134°
we know, angle of incidence and angle of reflection are equal.
Let β be the required angle
β + (180°-2i) + (180°-2r) = 180°
β -2(i+r) = -180
β = -180° + 2 x 134°
β = 88°
Hence, the angle between them is equal to 88°.
Answer is key whole saw.
Key whole saw is more often used to cut holes to install outlet boxes into a old installations.
Hope it helped you.
-Charlie